Graining mechanism.



S 6; 6088 6: E. J. SMITH.

GRMNING MECHANISM.

APPLICATXON FILED NOV.-29. I916.

' Patented July 10, 1917.

2 SHEETS-SHEET I.

S. G. 6033 &-E. J. SMITH.

GHAINING MECHANISM. APPLICATION men Nov.29, 191s.

Patfinted J 1115i 10, 1917.

2 SHEETS-SHEET 2- IINITEU @TATE@ PATENT 11FFIE SAMUEL Gr. GOSS, OF GLENCOE, AND ERNEST JAMES SMITH, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE GOSS PRINTING PRESS COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

GRAINING MECHANISM.

Specification of Letters Patent.

Patented July 10, 1917.

To all whom it may concern:

Be it known that we, SAMUEL G. GOSS, a citizen of the United States, and a resident of Glencoe, in the county of Cook and State of Illinois, and ERNns'r JAMES SMITH, a subject of the King of England, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Graining Mechanisms, of which the following is a specification, reference being had to the accompanying drawings.

Our invention relates to graining mechanisms of a type adapted for graining a zinc or aluminum plate to be used for engraving purposes, the graining being effected upon the portions of the face of the plate not occupied by the design for the purpose of rendering such grained portions capable of retaining moisture for preventing the ink from adhering thereto. In the graining of a plate for this purpose it is desirable that the cavities be deep and narrow in order to obtain the best effects. As will be readily understood, when a plate is grained in a straightened fiat condition and then subsequently given a curvature with the grained surface on the outside, the cavities of the graining will be quite materially broadened relative to their depth by the operation of curving the plate, rendering the grained plate thus less acceptable' It is the principal object of our invention to provide graining mechanism adapted to operate upon the outer face of a plate already given a curvature corresponding to or similar to that which the plate will have when in place upon the printing cylinder. It is another object of our invention to improve graining mechanism in sundry details hereinafter pointed out. The preferred means by which we have accomplished our several objects are illustrated in the drawings and are hereinafter specifically described. That which we believe to be new and desire to cover by this application is set forth in the claims.

In the drawings Figure 1 is a side view of a graining mechanism embodying the preferred form of our improvements Fig. 2 is an end view of the mechanism of Fig. 1 as seen from the left in said figure;

Fig. 3 is a fragmentary sectional view, being taken substantially on line 3--3 of Fig. 1; and

Fig. 41 is a fragmentary View, showing a portion of the mechanism at the right hand end of the machine shown in Fig. 1, illustrating the releasable means for holding certain of the parts in position.

Referring to the several figures of the drawings in which corresponding parts are indicated by the same reference characters,-

15 indicates a frame having journaled therein a longitudinallyextending shaft 16 upon which is fixedly mounted a support 17 having a curved upper end portion, the support being substantially in the form of a segment of a drum.- The curved periphery of the drum-like support 17 is provided with a plurality of longitudinally-extending strips 18 preferably of wood about which is stretched a plate 19 of zinc or aluminum preparatory to the graining operation.

The drum 17 is adapted to be rocked about the axis of the shaft 16 by means of a segmental gear 20 which is fixed upon the shaft 16, the gear 20 being reciprocated by a segmental gear 21 which is revolubly mounted upon a transversely-extending pin 22 suitably mounted upon the frame 15. The segmental gear 21 has fixedly connected thereto a rock-arm 28 which rises therefrom, the upper end of the rock-arm being connected by means of a link 24; with the end. of a crank arm 25 carried by a transverselyextending shaft 26 which is driven by any suitable means from a motor 27 of any suitable type. As will be readily understood, upon the rotation of the shaft 26 and the crank arm 25 the segmental gears 21 and 20 will be rocked in unison, serving thus to rock the shaft 16 and the drum-like support 17.

Revolubly mounted upon the shaft 16 and extending upward therefrom are two broad arms or plates 2S-29 which are joined together at their upper ends by two crossbars 30-31 so as to form a rigid framework. A frame or casing 32 is slidably mounted upon the bars 30-31, being supported in position upon said bars by suitable perforated cars 33. As is best shown inFig. 3, no bottom closure is provided for the frame 312, the lower edges of the frame being shaped to conform to the surface of a plate such as 19in position upon the support 17. As isalso shown in Fig. 3, the frame 32 is adapted to hold in position a quantity of marbles or similar graining instrumentalities, as indicated by 34. A supply of sand of suitable fineness and a suitable supply of water are also to be fed to the frame 32 at intervals as may be required for proper graining, all as is fully understood inthe art. The support 17 is provided at its side edges with hinged plates 3536 which are adapted to assist in maintaining the sand and water in position upon the support, such platesbeing adapted to be swung out of operative position as desired to permit any surplus of sand and water to fall into drip pans13-738 as may be .desired. 7

Means is provided .for reciprocating the frame 32' longitudinally of the bars 30 31 as the support 17 is rocked about theaxis 16. This means comprises an arm 39 pivotally mounted upon a transversely-extending pin 40 carried by asuitable portion of the frame 15. The arm 39 is swung longitudinally of the machineby means of a second arm 41 fixedly mounted uponthe pin or rock-shaft 40 and provided at its lower end with a stud or roller 42 acted upon by a cam member 43 fixed upon therock-shaft 16. 1 The upper end of the arm 39'is connected by a link 44 with the end ofvthe frame 32, the connection of the link with the frame being a releasable pin and slot connection as is clearly shown in Fig. 1. The arrangement and proportions of the parts are such that upon each swing of the support 17 ineach direction the frame 32 is moved longitudinally from end to end of the said support.

In order to provide for dumping the contents of the frame 32 in one of the drip pans 3738 as may be desired, we have provided thatthe means by which the arms 2829 are held in operative upright position shall be releasable so as to permit such arms and the frame 32 to be swung about the axis of the shaft 16. This releasableholding means comprises a key or pin 45 slidably mounted in suitable ears 46 carried by the arm 29, a spring 47 being provided upon such key serving to hold the :key yieldingly in its lowermost position. As is shown in Fig. 4,

the pin 45 is adapted to engage a suitable notch in a fixed segment 48 for holding the framework comprising the arms 2829 and the bars 30-31 in their normal operative position. The pin or key 45 is adapted to be retracted from engagement with the sector 48 by means of a link 49, pivotally connected thereto and provided at its upper end with a latch-lever 50 of the ordinary type.

i What we claim as our invention and desire to secure byLetters Patent, is

1; 1. In a graining mechanism, the combina- C5 tion of a support adapted to hold in curved position a plate to be grained, a frame adapted to hold in position upon the outer curved face of said plate a quantity of graining instrumentalities, and means for giving said curved plate and said frame a sliding movement relative to each other.

2. In a graining mechanism, the combination of means for holding graining materials, and a rocking member adapted to support a plate in operative position relative to said holding means.

3. In a graining mechanism, the combination ofa support adapted to hold in curved position a plate to be grained, a frame adapted .to hold in position upon the outer curved face of said plate a quantity of grainin-g instrumentalities, and means for giving said frame a sliding reciprocating movement in an axial direction along said curved plate.

4. In a graining mechanism, the combination of a support adapted to hold in curved position a plate to be grained, a frame adapted to hold in position upon the outer curved face of said plate a quantity of graining instrumentalities, and means for giving said support a circumferential rocking movement relative to said frame.

5. In a graining mechanism, the combination of a support adapted to hold in curved position a plate to be grained, a frame adapted to hold in position upon the outer curved face of said plate a quantity of grain ing instrumentalities, means for giving said frame-a sliding reciprocating movement in an axial direction along said curved plate, and means for giving sa d support a circumferential rocking movement relative to said frame. I

6. In a graining mechanism, the combination of a shaft, a support having a curved upper end fixed upon said shaft, means for carrying upon said support in curved position thereon a plate to be grained, means for rocking said shaft, a frame adapted to rest upon the uppermost portion of such plate and to support in position a quantity of graining;instrumentalities, means for holding said frame against movement circumferentially of saidsupport as the support is rocked, and means actuated by the rocking of said shaft for reciprocating said frame in an axial direction upon the surface of said .plate. I I

7. In a graining mechanism, the combination of a shaft, a support having a curved .upon the uppermost portion of such plate and to support in position a quantity of grammg mstrumentalities, means forholding said frame against movement circumferentially ofsaid support as the support is rocked, a cam mounted upon said shaft, and

means actuated by the rocking, of said shaft and said cam for reciprocating said frame in an axial direction upon said curved plate.

8. In a graining mechanism, the combination of a shaft, a support having a curved upper end fixed upon said shaft means for carrying upon said support in curved position thereon a plate to be grained, means for rocking said shaft, a frame adapted to rest upon the uppermost portion of such plate and to support in position a quantity of graining instrumentalities, means for holding said frame against movement circumferentially of said support as the support is rocked, a cam mounted upon said shaft, an arm adapted to be reciprooated by said cam upon the rocking of said shaft, and releasable connections between said arm and said frame for reciprocating said frame in an axial direction upon the curved outer face of said plate, the means for holding the frame against movement circumferentially of the support being releasable for permitting the frame to be moved circumferentially of the plate for dumping the contents of the frame.

SAMUEL G. GOSS.

ERNEST JAMES SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

